Provided is a device for determining a wheel fastening state that allows a wheel fastening state to be monitored during running. The device includes a sensor unit (3) that is attachable to and detachable from a wheel fastening part, an information terminal (4) that is an in-vehicle device (4A) or a portable terminal (4B), and a server (30). The terminal (4) includes a measurement instruction module (23) to read vehicle state data from a control and communication system (5) of a vehicle and send an instruction for to measurement to the sensor unit (3) at determined timing. The server (30) includes a first information processing module (32) configured to determine an abnormality of a fastening state of the wheel fastening part by comparing the measurement data with accumulated data that is measured under the same condition and stored in the past.

Lug nut locking systems, including s for securing lug nuts on a wheel of a motor vehicle comprising a frame with ratcheting apertures. In some embodiments, the device has a pair of supports that fit over the wheel's lug bolts and underneath the frame. In other embodiments, the device comprises uniquely configured securing caps that fit over the lug bolts. In still other embodiments, the device comprises a plurality of protective covers that fit over the securing caps.

Implementations disclosed and claimed herein provide systems and methods for identifying and mitigating lug nut loosening. In one implementation, an indicator body of an indicator has a top surface connecting a front surface and a back surface. A first side of the indicator body is disposed opposite a second side of the indicator body. A receiver extends from the top surface into an interior of the indicator body. The receiver is configured to form a translational relationship of the lug nut with the indicator through a mating fit of the lug nut within the receiver. The translational relationship generates a corresponding rotation of the indicator body in response to a rotation of the lug nut. The corresponding rotation of the indicator body provides an indication that the lug nut is loose.

A wheel hub safety device is for a vehicle having a hub and a wheel. The hub having a plurality of opposing equiradially disposed wheel bolts. The wheel having a plurality of opposing equiradially disposed holes spaced for mating engagement with the wheel bolts on the hub. The wheel is configured for attachment to the hub through use of a plurality of lug nuts. The wheel hub safety device has a housing and a plurality of lug nut rotation detectors. The housing is for housing the plurality of lug nut rotation detectors, at least one sensor and a transmitter.

An axle of railway wheel sets and a corresponding method for the ultrasound inspection are described. A blind hole, coaxial to the axle and sized to accommodate an ultrasonic probe, is obtained in each end of the axle. Main holes are intended to accommodate the probe holder containing a plurality of ultrasonic transducers for the inspection of the axle from the inside of the hole. The main advantage is to facilitate the propagation of the ultrasounds without being subjected to the interference caused by the geometric discontinuities normally present at the ends of the axles thereby minimizing false positives in the readings of the echoes.

A vehicle sensor system includes a fluid sensor configured to be disposed onboard a vehicle system and at least partially extend into a gearbox of a traction motor of the vehicle system. The fluid sensor is configured to output data representative of an amount of a lubricating fluid in the gearbox. The system also includes a positioning system configured to output data representative of movement or an absence of movement of the vehicle system, and one or more processors configured to determine the amount of the lubricating fluid in the gearbox based on the data that is output by the fluid sensor responsive to the data output by the positioning system indicating that the vehicle system has not moved or has moved by less than a designated distance for at least a designated, non-instantaneous period of time.